/*隐藏名字*/
.helloUserName{
    position: absolute;
    top: 0;
    text-align: right;
    right: 100%;
    width: 200px;
    height: 20px;
    color: #6e6767;
    transition: all 1s;
    opacity: 0;
}

/*头像下拉*/
.userImg{
    position: relative;
}

/*放到头像下拉 显示名字*/
.userImg:hover .helloUserName{
    opacity: 1;
}